VarDict: annotate with DB flag for PureCN germline variants
VarDict: annotate with DB flag for PureCN germline variants

Provides DB flag in INFO field based on VarDict STATUS=germline. This allows
PureCN to flag germline variants as inputs.

chapmanb/bcbio-nextgen,vladsaveliev/bcbio-nextgen,a113n/bcbio-nextgen,lbeltrame/bcbio-nextgen,vladsaveliev/bcbio-nextgen,lbeltrame/bcbio-nextgen,chapmanb/bcbio-nextgen,vladsaveliev/bcbio-nextgen,a113n/bcbio-nextgen,lbeltrame/bcbio-nextgen,a113n/bcbio-nextgen,chapmanb/bcbio-nextgen